Brilliant gemstone



FIG. 1 is a top plan view of a brilliant gemstone showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an auxiliary view thereof; and,

FIG. 4 is a bottom view thereof.

The rear and side elevational views are identical to the front elevational view illustrated in FIG. 1, the corner elevational views not illustrated are identical to the auxiliary view illustrated in FIG. 3. 

The ornamental design for a brilliant gemstone, as shown and described. 